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Finding the Fourth Proportional to 977.75, 1,466.99 and 631.74

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Solution

The fourth proportional to 977.75, 1,466.99 and 631.74 is: 947.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.75 : 1,466.99 = 631.74 : x
  2. Step 2: Convert to fraction form
    977.75/1,466.99 = 631.74/x
  3. Step 3: Cross multiply
    977.75x = 1,466.99 × 631.74
  4. Step 4: Simplify right side
    977.75x = 926,756.26
  5. Step 5: Solve for x
    x = 926,756.26/977.75
  6. Step 6: Final answer
    x = 947.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.